Shoe-end lasting machine



April 30, 1935. w. MULLER SHOE END LASTING MACHINE Filed May 27, 1935 6 Sheets-Sheet 1 April 30, 1935. w. MULLER 1,999,545 SHOE END LASTING MACHINE Filed May 27, 1953 e Sheets-Sheet 2 April 3@, 1935. w. MULLER SHOE END LASTING MACHINE 6 Sheets-Sheet a Fled May 27, 1933 w. MULLER FiledMay '27, 1955 SHOE END LASTING' MACHINE A rii so, 1935.

A ril 30, 1935. w. MULLER SHOE END LAS YI ING MACHINE Filed May 27, 1933 6 Sheets-Sheet 5 2 vzvgz $20 7 6 Sheets-Sheet 6 Filed May 27, 1935 Flag Patented Apr. 30, 1935 1,999,545

UNITED STATES PATENT OFFICE 1,999,545 SHOE-END LASTING MACHINE Wilhelm Miiller, Weissenfels-on-the-Saale, Ger-.-

many, assignor to the firm of Nollesche Werke Kom. Ges., Weissenfels-on-the-Saale, Gervma s Application May 27, 1933. Serial No. 673,154 In Germany June 6, 1932 '9 Claims. (01. 12-4) The present invention relates to machines for o t e t c g dev c s when lasting the Shoelasting the toe and heel part of shoes by means which are partly or wholly driven by a hydraulic F g. 6 s 8- et n 011 the line VIVI f 8- 5 medium. The working instrumentalities of the through the real P 5 machine are carried by plungers the cylinders Fig. '7 isasection on the line VII-V11 of Fig. 5 5

of which are according to the invention in conthrough e front D stant communication with the pressure outlet of i 8 s a plan view of the wip When lasta continuously working pump. The pressure ing the shoe-heel, and in part a horizontal secfluid is continuously fed through the cylinders, tiOn sh g the arra nt of the Plungere. l0 and a valve under the control of the operator T e s oe to b lasted ieplaeed D the last 10 directs it either on the pressure side of the pin e toe end of e Shoe D e upon the plungers to act upon the work or on the opposite toe. support 2 which is adjustable vertically by side of the plungers so as to bring the latter the serrated nut 3. The toe support is adjustable into position of rest allowing a continued free lengthwise for difi'erent sizes of shoes in the i6 and idle circulation of the fluid. Thus by means groove I of the table 5. The table 5 i ui d in of a treadle the machine can be set in motion a curved groove 5' of the frame 6 and can be and operated as if it were driven by a transmisclamped by the lever 1 so that the toe part or the sion belt or by an electric motor. heel part of the shoe is held in a horizontal posi- Lasting machines which automatically last tion. The frame 6 slides in the guide 8 fastened the heel part or the toe part of shoes are known. to the plunger 9. On the frame 6 is mounted a 20 These machines are mostly built separately for two-part lose ring l0 connected by the bolt II to lasting the heel or for lasting the toe and have the plunger ll adapted to pull the frame inward. the disadvantage that for several reasons difler- The whole device for holding the shoe can be ent adjustments or arrangements of the nailing lowered against the pressure of the spring I5 by and w p n m ans ar n ssary f r last n the handle is engaging with a sliding block into 25 pointed ladies shoes and for lasting of large the groove of the plunger 9. gentlemens shoes. These adjustments and re-- The continuously working pump I6 is screwed arrangements of the machines diminish the outto the machine frame l1 which forms a fluid p of the machinesve it p eet ee y reservoir. It sucks the pressure fluid (thin presnot feasible to provide separate wipers for all ur n d presses t through t overflow 30 difierent shoe forms in order to last accurately valve l9 into the upper leads 2!! and 2|. e y S e sh As shown in Fig. 1 the shoe to be lasted is held The present invention shows and describes a by hand against the fixed abutment 22. Its lasting machine adapted to automatically and vertical position is determined by the sole presser 5 successively last the heel part or the toe part of 23 against which the shoe is held by the pressure ny form of h s withou h ex han f parts of the spring IS. The sole presser 23 is vertically and without the adjustment of the nailing wipadjustable. To this end its front face forms a ers. This is obtained by the hydraulic operation rack engaging into the toothed shaft 24. On the of th wipers, The ta k driving means ar 15 shaft 24 is fastened a ratchet wheel held in positened to the wipers. and adapt themselves to 51011 by a l 25 pivoted 0n the frame the given shoe form. p In the body 21 there are arranged several radial These and other features of the invention are pressure plung?rs w of which described in the following specification and are commumcate wlth single P Pressure chamber illustratedin the attached drawings, in which 29 built 1 theuform of seml'circle' The phmg 4 Fig. 1 shows a vertical section along the line ers 28 28 are connected by Shackles 0 to the carriers 3| of the nailing devices and to g i g; the plunge being in worktng wipers 32, 32', 32". All lateral wipers 32,

32". are arranged .to swing about the fixed is like section' the plunge being point 33. Only the rear wiper 32 has a straight shown in 1395mmn of restwiping movement in the direction of the longi- 3 shows the section along the t tudinal axis of the shoe in order to prevent the f 1 through t e dd f the h supformation of plaits at the end or in the middle of l v the heel of the shoe.

4 is a front view of the machine. The front edge of the rear wiper 32 is shaped Fig. 5 shows the position of the wipers and as to abut in its nailing position against the edges 55 of the lateral wipers 32. The movement of the pressure plungers and of the wipers pivoted thereto is limited by stops 34 screwed to the wipers and coming into contact with the leather band 35 which is suitably held in the machine to enclose the heel or the toe of the shoe.

Underneath the rear plunger 28 there is arranged a sliding valve 36 connected by the stem 3! to the knee-lever 38. This lever is pivoted on the fixed bolt 39 and is connected by the bar 49 to the treadle 4!.

Fig. 2 shows the machine while it is running idle. The oil pressed through the duct 2| into the chamber 43 flows through the port 14, between the seats of the valve 36, the port H, the room in front of the plunger 28, and the bore 13 into the return pipe 10.

By operating the treadle 4| the controlling valve 36 is moved into operative position shown in Fig. 1. The continuously running pump feeds pressure oil into the cylinder chambers 42, 43.

The Oil enters through the port "between the seats of the valve 36 and then through the port 68 into the chamber 29. The growing pressure in the chamber 29 acts upon the plungers 28, 28, 28". only, as the way of the plunger 9 is limited by the sole pressure 23 and the way of the plunger II is limited by the fixed stop 22 against which the shoe end is abutting. By this pressure all plungers 28, 28'. and the wipers screwed and linked thereto move against the shoe. Thus the upstanding upper is wiped over the last. This overwiping takes place for all shoe forms in a perfectly uniform manner, as owing to the pressure in the common pressure chamber 29 always all plungers are moved at the same time and with the same force. Owing to the high uniform pressure exerted by all wipers the edge of the last is visibly marked on the upper leather so that a subsequent pounding up may be dispensed with. The degree of pressure of the oil is always the same in the raising ducts 20 and 2! and in the cylinder chambers 29, 42 and 43. The diameter of the plunger I l is so proportioned relatively to the individual plungers 28, 28'. that the shoe cannot yield outwardly while being over-wiped. The degree of pressure for heavy and light shoes can be regulated by the hand wheel 44. The excess of pressure oil which is continuously fed by the pump is returned against the action of the spring in the overflow valve through the overflow pipe 45 into the tank. It is obvious that a repeated overwiping can be obtained by repeatedly moving the controlling valve 36 to and fro.

To the knee lever 38 is pivoted a link 46 connected to the coupling lever 41. The coupling lever is arranged on the shaft 48 in the machine head. By operation of the treadle at first the controlling valve 36 is brought into effective .position as already described and as shown in Fig. 1, and then a bolt coupling I5 is released by means of the arm 49 fastened to the lever 46. The movement of the coupling is derived from a belt-pulley on the shaft of the pump I6. The description of the bolt coupling is omitted as it is well known in the art. To the shaft 16 of the coupling is keyed a toothed wheel 5| whichis in mesh with the toothed wheel 52 fixedly connected to the eccentric shaft 53. The diameter of the-Wheel 52 is twice as long as the diameter of the wheel 5|. On the eccentric is arranged a strap 54 connected by the bolt 56 to the lever 55. The lever 55 is journaled in the machine head by the shaft 51 and is connected to the tack driving plate 59 by means of the link 58. The tack driving hammers 6| are fastened to the hammer bars 66 and drive the tacks for fastening the upper leather to the insole. The follower 62 attached to the tack driving plate 59 serves for carrying the hammer bars 68 back into the upper position. The rear end of the lever 55 is connected by the link 63 to the rack 64 guided in the post 65 of the tack-apparatus. The rack engages into a gear keyed on the bearing shaft of the tackdrum 66. By the movement of the lever 55 the drum is oscillated in order to separate the tacks. The means for separation of the tacks and the control of the number of the tacks are well known in the art and need not to be described in detail.

On the eccentric-shaft 53 is keyed a roller lever 61 about 45 in advance of the lowest position of the eccentric, see Fig. 2. This roller lever presses at the end of its rotation the coupling lever 41 down back into its end position, so that the coupling is freed from the arm 49. The controlling valve is thereby moved into the position of Fig. 2.

The oil in the high pressure room 29 flowsnow through the channel 68, the lateral discharge pipe 69 and the outlet pipe 10 back into the tank. On the other hand the oil fed by the continuously working pump presses the plungers is provided only for limiting the way of the' plungers 28 in a forward direction, when no shoe is introduced and the control valve 36 is held in the operative position shown in Fig. 1. In this case the pressure fluid entering into the chamber 29 leaves the latter through the port 13 without any material effect upon the plungers.

At the end of the operation the plunger II is pushed outward by the compressed spring A against a suitable stop. The port H leads to a semicircular room H, and the port 68 leads to a semicircular room 68. Thus a single port 12 is needed for all plungers 28 to 28"". But this port must not be uncovered by the plunger 28 until all lateral plungers are returned into their rear position. This is obtained by the provision of the compression spring C behind the plunger 28 only. Thus at first all lateral plungers are moved to the rear and the plunger 28 is moved as last one into this position.

The shoe being lasted in oneoperation at the toe or at the heel is turned about the axis of the plunger 9 for to be lasted at the heel or toe part of the shoe in a continued operation in the manner described.

As shown in Fig. 8, one or more plungers 28 can be removed from operation by pushing stop pins 14' into holes of the said plungers.

What I claim is:

1. In a shoe end lasting machine a series of wiping and nailing instrumentalities supported by a series of radially arranged plungers, a shoe support carried by avertically movable plunger and connected to a. horizontally movable plunger, a continuously running pump feeding a pressure fiuidto the cylinders of the single plungers and back to a pressure fluid container and means for successively directing the constantly fed pressure fluid to one or the other side of the plungers to bring them into and out of their working position. 2. In a shoe end lasting machine a series of wiping and nailing instrumentalities supported by 3 Series of radially arranged plungers, a shoe support carried by a vertically movable plunger and connected to a horizontally movable plunger, a continuously running pump feeding a pressure fluid to the cylinders of the single plungers and back to a pressure fluid container, means under the control of the attendant for directing the constantly fed pressure fluid to one side of the plungers so as to press them into operative position, and means acting automatically at the end of the operation to direct the said fluid to the other side of the plungers and to bring them.

back into their initial position, and a relief valve Within the duct connecting the pump to the plungers opening when the pressure of the fluid exceeds a predetermined degree.

3. In a shoe-end lasting machine, a series of wiping and nailing instrumentalities, a series of radially arranged plungers connected to these instrumentalities, a continuously running pump feeding a pressure fluid, common fluid chambers on both ends of the plungers, ducts leading the pressure fluid from the. pump to the rear chamber situated on the free ends of the plungers, a relief valve within these ducts, ducts leading thepressure fluid from the pump to the front chamber situated on the ends of the plungers connected to the ins'trumentalities, outlet ducts from the chambers, means under the control of the attendant for directing the fed fluid to the rear chamber, and means acting automatically at the end of the operation to direct the said fluid to the front chamber.

4. In a shoe-end lasting machine, a series of Wiping and nailing instrumentalities, a series of radially arranged plungers connected tothese instrumentalities, a continuously running pump feeding a pressure fluid, common fluid chambers at each end of the plungers, ducts leading the pressure 'fluid from the pump to the rear chamber situated on the free ends of the plungers, a relief valve within these ducts, ducts leading the pressure fluid from the pump to the front chamber situated on the ends of the plungers connected to the instrumentalities, outlet ducts from the chambers, a spring tending to keep one of the plungers in a position to interrupt the communication between the front chamber and the outlet ducts, means under the control of the attendant for directingthe fed fluid to the rear chamber, and means acting automatically at the end of the operation to direct the said fluid. to the front chamber.

5. In a shoe end lasting machine a last carrier, a vertically movable plunger supporting the carrier, a horizontally movable plunger connected to the carrier, means under the control of the attendant for moving the said plungers in succession by means of a pressure fluid fed to the plungers, and abutments limiting the movements of said plungers in bringing the last car- 'rierto its lasting position.

6. In a shoe-end lasting machine, a last carrier rotatable about a vertical axis and movable into and out of lasting position, a plunger connected to the carrier, a continuously running pump feeding a pressure fluid, and means under the control of the attendant for moving the plunger by means of the fed pressure fluid into lasting position.

'7. In a shoe-end lasting machine, means for Wiping the upper-margin over the last, hydraulic means for moving the wiping means, means controlling the hydraulic means and operated by the attendant, power driven nailing devices for fastening the overwiped upper-margimand automatic means acting in succession to the said hydraulic means to operate the nailing devices.

8. In a shoe end lasting machine a central wiper having a straight movement and a plurality of lateral wipers arranged side by side and guided laterally by the central wiper to get to their working position by swinging about a common fixed point situated in the longitudinal axis of the shoe.

9. In a shoe-end lasting machine, wipers, hy-

draulic plungers for moving the wipers, and means for immobilizing some of the wipers in their inoperative position.

WlLI-IEIM MilLLER. 

